Compare 661987 vs 661988

Property	661987	661988
Type	prime	composite number
Unique factors	1	3
Total factors	1	4
Prime factorization	661987¹	2² × 167¹ × 991¹
Prime factorization	661987	2 × 2 × 167 × 991
Divisors count	2	12
Divisors	1, 661987	1, 2, 4, 167, 334, 668, 991, 1982, 3964, 165497, 330994, 661988
Number of properties	5	0
Additive primes	20970th
Chen primes	21009th
Isolated primes	42127th
Primes	53716th
Sexy primes (1st member)	11599th
Roman numberals
Base 2	10100001100111100011₂	10100001100111100100₂
Base 3	1020122002001₃	1020122002002₃
Base 4	2201213203₄	2201213210₄
Base 5	132140422₅	132140423₅
Base 6	22104431₆	22104432₆
Base 7	5424664₇	5424665₇
Base 8	2414743₈	2414744₈
Base 9	1218061₉	1218062₉
Base 10	661987₁₀	661988₁₀
Base 11	4123a7₁₁	4123a8₁₁
Base 12	27b117₁₂	27b118₁₂
Base 13	1a2411₁₃	1a2412₁₃
Base 14	13336b₁₄	13336c₁₄
Base 15	d1227₁₅	d1228₁₅
Base 16	a19e3₁₆	a19e4₁₆